True spasms when corrected gain acceptance (4,6)
I believe the answer is:
pass muster
'gain acceptance' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'true spasms when corrected' is the wordplay.
'when corrected' indicates an anagram.
'true'+'spasms'='truespasms'
'truespasms' with letters rearranged gives 'PASS MUSTER'.
Can you help me to learn more?
(Other definitions for pass muster that I've seen before include "Satisfy, suffice" , "To fit the bill" , "Be good enough" , "appear acceptable" .)